MT3608 Mini Adjustable DC-DC Boost Module

MT3608 Mini Adjustable DC-DC Boost Module — 2.5–24V In / 5–28V Out / 1.5A

The MT3608 is a compact, low-cost DC-DC boost (step-up) converter module measuring just 37×17mm — small enough to fit on a breadboard or inside a compact enclosure. Based on the MT3608 boost converter IC running at 1.2MHz, it uses ceramic capacitors instead of electrolytic caps for long-term reliability and compact packaging. Output voltage is adjustable from 5V to 28V via a multi-turn potentiometer, with input voltage range of 2.5–24V.

Best suited for low-to-moderate current applications (up to 500mA–1A) where compact size and low cost are priorities. For higher current requirements, consider the LTC1871 (6A) or LM2577 (2A) modules.

Key Specifications

• Controller IC: MT3608
• Topology: Non-isolated boost (step-up) converter
• Input Voltage Range: 2.5V – 24V
• Output Voltage Range: 5V – 28V (must be higher than input)
• Output Current: 1.5A peak / 1.0A recommended continuous
• Switching Frequency: 1.2MHz
• Efficiency: Up to 92%
• Output Ripple: ~500mV typical (add 100µF output cap to reduce to ~30mV)
• Voltage Adjustment: Multi-turn potentiometer (CCW = increase, CW = decrease)
• Connections: Solder pads with through-holes (VIN+, VIN−, OUT+, OUT−)
• Idle Current Draw: ~1mA (disconnect from battery when not in use)
• Dimensions: 37 × 17 × 7mm
• Electrical Isolation: Non-isolated (VIN− and OUT− are common)

Performance Notes

• Best performance: Output current ≤500mA — good voltage and load regulation
• At 1A load: Output may drop ~1.3V from no-load setting — adjust pot accordingly
• Ripple reduction: Add 100µF electrolytic capacitor across output — reduces ripple from 900mV to 30mV in worst case
• Voltage regulation: 5–9V input variation causes ~0.11V output change at 500mA load
• Thermal protection: Built-in overcurrent and thermal shutdown in MT3608 IC

Wiring

• VIN+: Positive input (2.5–24V)
• VIN−: Input ground
• OUT+: Positive output (5–28V)
• OUT−: Output ground (common with VIN−)
• Solder wires or short jumper pins to pads for breadboard use

MT3608 vs. LM2577 vs. LTC1871

• MT3608: 2.5–24V in, 5–28V out, 1A. Smallest, lowest cost. For compact low-current boost applications.
• LM2577: 3.5–35V in, 5–56V out, 2A. Higher output voltage (up to 56V). For 48V applications.
• LTC1871: 3.5–30V in/out, 6A continuous. Highest current, built-in voltmeter. For high-power applications.

Typical Applications

• 3.7V LiPo → 5V USB output (power bank circuit)
• 5V USB → 9V/12V for Arduino projects requiring higher voltage
• 3.3V MCU supply → 5V for peripherals
• Solar panel (low voltage) → 5V/12V regulated output
• Compact embedded system voltage boost
• LED driver supply boost (5V → 12V for LED strips)

Package Contents

• 1 × MT3608 mini adjustable DC-DC boost module

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